Pump.



PATENTBD MAR. 1o, 1908. P, A. MYERS. PUMP. APPLIOA'TION FILED MAR. 19,1907.

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UNITED STATES PATENT OFFICE.

PHILIP A. MYERS, OF ASHLAND, OHIO, ASSIGNOR TO F. E. MYERS AND BROTHER,OF ASHLAND, OHIO, A COPARTNERSHIP.

PUMP.

Specification of Letters Patent.

Application led March 19, 1907.

Patented March' 10, 1908.

Serial No. 363,276.

To all whom it may concer/n.:

Be it known that I, PHILIP A. MYERS, a citizen of the United States,residing at Ashland, in the county of Ashland and State of Ohio, haveinvented certain new and useful Improvements in Pumps, of which thefollowing is a specication, reference being had therein to theaccompanying drawings.

The present invention relates to pumps, and more particularly to pumpcylinders.

The object of the invention is to provide the pump cylinder with a checkvalve which will be Withdrawn upon the removal of the plunger and pumprod and in which this result can be accomplished without the necessityof making any connection between the plunger or pump rod and the valveas is necessary in pump cylinders where the check valve is provided witha screw-threaded boss, adapted to be engaged by a screwthreaded socketcarried by the plunger and in which it is necessary to connect theplunger to the valvebefore the latter can be removed. To accomplish thisresult I cony nect the plunger to the check valve by means of a looseconnection which will permit the plunger to move freely within thecylinder throughout the length of its stroke without displacing orotherwise disturbing the check valve, but which will cause the checkvalve to move along with the plunger when the latter is withdrawn fromthe cylinder.

With these objects in view my invention consists of certain novelfeatures of construction hereinafter to be described, and thenmore fullypointed out in the claims.

In the accompanying drawings, Figure 1 is a longitudinal, sectional viewof a pump cylinder embodying my invention, showing the plunger in itslowermost position; Fig. 2 is a similar view showing the plungerpartially removed from the cylinder; and Fig. 3 is a detail sectionalview of the check valve.

In Figs. 1 and 2 of these drawings I have shown the preferred form of myinvention, in Which the cylinder is indicated by the reference numeral 1and is rovided near its lower end with a suitable va ve seat which maybe supported from the cylinder in any suitable manner. In the form hereshown, the valve Seat 2 is formed in an extension 3 which is screwedonto the lower end of the cylinder 1. A plunger 4, which reciprocateswithin the casing 1, consists of a hollow body portion having its upperand lower ends of a diamel ter slightly less than the internal diameterof the cylinder 1 and having the central portion thereof reduced to forman annular recess, as shown at 5, in which are secured the buckets orpacking rings 6. The body portion of the plunger 4 is preferably formedin two pieces, as shown, to facilitate the placing of the buckets orpacking rings thereon, and the adjoining ends of the two sections arescrewthreaded, as shown at 7, for uniting the same. The upper portion ofthe plunger 4 is provided with a suitable check valve connecting thesame with the interior of the cylinder 1 above the plunger. In thepresent instance, this valve is formed by providing the body portion 4with a conical head or upper portion 8 and forming a series of apertures9 through the wall of this conical head, these apertures beingpreferably formed out of alinement with the` aperture extending throughthe body portion 4. The conical portion 8 is rovded with-an extension10, Awhich is tuular in form and extends a slight distance beyond theupper end of the plunger, where it is joined to and forms a part of thepump rod. A collar 11 is mounted to reciprocate freely upon the tubularextension 10 and has its lower end flared, as shown at 12, to correspondto the outer surface of the conical head 8 and of a length sufficient toextend below the apertures 9 formed in said head. The tubular extension10 of the plunger 4 is united at its upper end to the tubular lowerportion 13 of the pump rod 14, the internal diameter of which ispreferably slightly larger than the internal diameter of the extension10, thus forming a shoulder 15 at their point of union. These parts maybe joined in any suitable manner, that herein shown consisting of theusual threaded collar 16 engaging the abutting ends of the two members.

Mounted within the tubular lower portion of the pump rod is a rod 17,provided at its upper end with a head 18 adapted to engage with ashoulder 15 to prevent the withdrawal of the rod from the tubular pumprod. This rod extends through the hollow plunger 4 and is connected atits lower end to a check valve 19 which is adapted to engage the valveseat 2 supported near the lower end of the cylinder. The check valve 19may be of any suitable construction and the rod 17 may be securedthereto in any desirable manner, but I prefer the form shown in thedrawings, in

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which the check valve comprises two portions, the lower portionconsisting of the winged or corrugated guide portion 20 which extendsthrough the bushing 21 ofthe valve seat 2 and is provided at its upperend with a screwthreaded boss or extension 22, adapted to engage thescrew-threaded interior of the cupshaped upper portion 23, which isprovided at its lower end with a iiange 23a adapted to eX- tend over theedge ofthe valve seat and cooperate therewith in forming a wateitigl1tclosure. If desired, the iiange may be provided with an annular recess24 in its lower face to receive a packing or gasket 25 which is held inposition therein by means of the shoulder or flange 26 formed at thepoint of intersection of the lower portion 20 of the valve with itsscrew-threaded boss. The cu pshaped portion is provided in its upper endwith a central aperture 27 of a diameter suficient to receive the lowerend of the rod 17 which extends through the same and is provided on itsinner end with a head 2S of a size sufficient to prevent its withdrawalthrough the aperture. To facilitate the insertion of the lower end ofthe rod within the upper portion of the valve, the rod is preferablyformed in two sections and united in any suitable manner, such as by thesleeve- 29, which is screw-threaded to engage the screw threads on theadjacent ends of the two portions of the rod. This oint is preferablylocated near the lower end of the rod and enables theI lower portionthereof to be formed of brass or material similar to that of which thevalve and valve seat are formed and the upper portion to be made ofsteel or other suitable material. This form of connection between thevalve and the rod provides a swiveled joint which allows the valve afree rotary movement and a slight vertical movement relatively to therod.

From the foregoing description it will be apparent that the plunger 4has a free movement within the cylinder l throughout the length of itsstroke and that during this stroke the valve 19 is free to operate inits usual manner and is in no way controlled or influenced by theconnection between the same and the plunger, the weight of the rod 17being such as not to interfere with the operation of thc valve. When theplunger is moved beyond the upper limit of its stroke for the purpose ofwithdrawing the same from the cylinder, the head 1S of the rod 17engages with the shoulder 15 at the lower end of the tubular portionofthe pump rod and causes thc rod and thevalve to which it is connectedto move along with the plunger.

I wish it to be understood that I do not desire to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is.

l. In a device of the character descril'ied, the combination,with acylinder provided with a valve scat, and a valve adapted to engage saidseat and having a hollow upper portion provided with an inwardlyextending shoulder, of a plunger adapted to reciprocate in saidcylinder, a rod slidably connected at one end to said plunger and havingits other end extending into the hollow portion of said valve andprovided with a stop adapted to engage said shoulder.

2. In a device of the character described, the combination, with acylinder provided with a valve seat, and a valve ad aptcd to engage saidseat and comprising a solid lower portion, a hollow upper portiondetachably connected to said lower portion and having an aperturethrough the upper wall thereof, of a hollow plunger adapted. toreciprocate in said cylinder, a two part rod having one part extendingthrough said hollow plunger and provided with means to prevent itswithdrawal therefrom, and its other part extending into the hollow upperportion of said valve and provided with means to prevent its withdrawaltherefrom, and means for connecting the adjacent ends of the two partsof said rod.

In testimony whereof, I aflix my signature in presence of two witnesses.

PHILIP A. MYERS.

IVitiiesses:

F. B. Knrroeo, R. M. TUBBs.

